Founders & Small BusinessFree
Pitch Deck Feedback From a Seed Investor
Drop your deck or paste the slides. Get an investor's margin notes, the questions each slide invites, and why a partner might pass.
River reads your pitch deck the way a seed investor does before deciding whether to take the meeting, and leaves its reactions in the margin. You drop the deck or paste the slide text. You get a short investor read at the top: what a partner would think you do, what works, the first questions they would ask, and the likeliest reasons to pass. Underneath, your slides appear exactly as written, with comments anchored to the words that triggered them.
Unlike deck graders that score design or rewrite your copy in a generic voice, this keeps your words untouched and tells you how they land. The notes follow how partners actually read: numbers without a date, signups dressed up as traction, a market sized from an analyst report, a team slide that lists titles instead of proof. If you would rather build the deck from your notes first, the pitch deck writer writes every slide and its speaker notes.
It is for founders about to start outreach from an investor target list, and for anyone whose first ten meetings ended without a second one. Pick the round you are raising, since a pre-seed partner weighs the team and the insight while a Series A partner wants retention and repeatable growth. Investors reading a deck for their own decision should use the pitch deck analysis instead, which separates what a deck states from what it never says.
How a partner reads your deck
Most decks are read before they are presented. An associate or partner opens it from an email, often between meetings, and decides quickly whether to spend an hour with you. DocSend's pitch deck research found investors spend less than three minutes reviewing a deck. They are not reading for polish. They are trying to repeat your company in one sentence to their partners, and to find the one number that makes a meeting worth it. When they cannot do either, the reply is usually a polite pass with no reason given.
The questions are predictable, which is what makes them worth preparing for. Is the revenue paid, and over what period? Who is the buyer, and what do they use today? Why has nobody solved this, and why now? Why is this team the one to do it? What milestone does the money reach? A deck that answers those on the page, with dated numbers, saves the meeting for the conversation you actually want to have.
Feedback from real investors remains the best signal, but it is scarce and often softened. A pass rarely says your market slide was unconvincing. That is where a read like this helps: it gives you the blunt version before you spend your warm introductions. Treat the comments as the questions you will face, not as rules. If a note asks for a number you do not have, that is either a slide to cut or a fact to go and get.
How it works
Drop your deck
Attach the PowerPoint or PDF, or paste each slide's text in order, and pick your round.
River reads it
Every slide, chart and speaker note is read in full before a single comment is written.
Get the investor read
A short summary up top, then your unchanged slides with comments where a partner would react.
Prepare your answers
Ask River in chat to fix the top five changes or draft answers to the hardest questions.
What you get
- A one-sentence summary of your company as a partner would repeat it, built only from your deck
- Margin comments anchored to the exact words an investor would question, with what would answer each
- The five questions you will be asked first, ranked, with the slide that raises each one
- The likeliest reasons a partner would pass, stated plainly instead of the polite silence you usually get
- Your slides copied exactly as written, so nothing in your deck is rewritten or quietly changed
- Feedback weighted for your round, from team and insight at pre-seed to retention at Series A
Common questions
Will it rewrite my deck?
No. Your slide text is copied into the document exactly as written, typos included, and every note sits in a margin comment. You decide what to change. If you want help afterwards, ask River in chat to rework only the slides named in the top five changes, and it shows each original beside the revised version.
How many comments will I get?
As many as the deck earns, not a set number. A content slide with a vague claim and an undated metric might get three; a clean title slide gets none. Each comment is the reaction a partner would have at that line, so a short, sharp deck gets fewer notes than a long one, and that is a good sign.
Is this the same as feedback from a real investor?
No, and it does not pretend to be. Real investors know their own fund and may have seen your market up close. What this gives you is the blunt, consistent read that busy partners rarely write down, before you spend your warm introductions. Use it to fix the obvious gaps so your real meetings go further.
Which files can I use?
PowerPoint and PDF work best, including PDFs exported from Keynote, Google Slides, Canva or Pitch. You can also paste the slide text in order. If a slide is mostly an image or a chart River cannot read, the investor read says which slides those are rather than guessing what they show.
Why does the round matter?
Because the bar moves. At pre-seed, partners mostly judge the team, the insight and evidence that the problem is real. At seed they look for early traction and a reason the timing is right. At Series A they want retention, unit economics and growth that repeats. The same deck can be strong for one round and thin for the next.
Will it tell me if my startup is investable?
No. It judges how well the deck makes its case, not whether the business will work or whether any fund will invest. A strong company can have a deck that hides it, and that is the problem this solves. Whether a fund invests depends on things no deck shows, such as its portfolio, its timing and the partner.
Built by
Chandler Supple
Co-founder & CEO, River
Chandler has spent the last six years working in AI, building tools for millions of users and Fortune 100 companies. In 2025, he co-founded River to build a new kind of operating system for AI agents.
Pitch Deck Feedback From a Seed Investor
Describe what you need, add any files you have, and your workspace opens with the work already underway.